Removal and installation valves (DOHC engine) (Scorpio 2)

Note: If the valve drive parts are to be reused, they must be installed in their original locations. To avoid confusing the parts, it is recommended to prepare a suitable laying board.

Removal

Remove the cylinder head and place it on 2 wooden blocks to avoid accidentally damaging the open valves, see p. 16.

Remove the plate tappets from the cylinder head and place or mark them so that they can be installed in their original locations during assembly.



According to the drawing, make a retaining plate from a 6 mm thick steel sheet.



Make a retaining plate "C" and, as shown in the figure, screw it with a nut on the stud for fastening the camshaft bearing cover. Attach the special tool FORD 212-024 "A" and 21-024-04 "B", compress the valve spring with it and remove the crackers from the valve stem. To prevent the valve from going down when removing the crackers, place a wooden block in the combustion chamber of the cylinder head.

Caution: When pressing the spring plate to remove the crackers, do not damage the valve stem. If the stem is damaged, the valve must be replaced, as a damaged stem wears out quickly.

Release the valve spring, remove the spring plate and valve spring.

Remove the remaining valves in a similar manner.

Remove the valve from the cylinder head, remove the oil seal, see next chapter.

Installation

If the old valves and the old cylinder head are installed, the valve guides must be checked before assembly. If new valves are installed in the old cylinder head, the valve seats in the cylinder head must first be reworked and the valves must be ground in.

Clean the valves from any carbon deposits using a scraper and wire brush.

Clean the valve stems from burrs at the contact surfaces of the crackers.

The valve stems and valve guides are easily lubricated with SAE 80/90 hypoid oil (gear oil) and the valves are inserted

Use new valve stem seals. see next chapter.

Install the spring and upper spring plate onto the valve.

Using special tools FORD 212-024 and 21-024-04, compress the valve springs, insert crackers, and then release the springs.

Caution: Do not confuse the inlet and outlet valves.

Lubricate the plate tappets with oil and install them in the same holes in which they were located before removal.

Install the cylinder head, see p. 16.